Program to Check if a String Contains at least One Number

Check if string contains numbers python – Python Program to Check if a String Contains at least One Number

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Check if string contains numbers python: In the previous article, we have discussed Python Program to Find the Shortest Word in a String

Given a string and the task is to check whether the given string contains at least one number in it.

Examples:

Example1:

Input:

Given String = "Hello 123 this is BTechGeeks online Platform "

Output:

Yes, the above given string has at least one digit in it

Example2:

Input:

Given String = "good morning btechgeeks"

Output:

No, the above-given string doesn't have at least one digit in it

Program to Check if a String Contains at least One Number in Python

Below are the ways to check whether the given string contains at least one number in python:

Method #1: Using For Loop (Static Input)

Approach:

  • Give the string as static input and store it in a variable.
  • Take a variable say k and initialize its value to 0.
  • Calculate the length of the given string using the len() function store it in another variable.
  • Loop from 0 to the length of the given string using the for loop.
  • Check if the character present at the iterator value of the given string string is greater than or equal to 0 and less than or equal to 9 using the if conditional statement.
  • If the statement is true, then increment the value of the above-initialized k by 1.
  • Exit the loop.
  • Check if the value of k is greater than or equal to 1 using the if conditional statement.
  • If the statement is true, then print “Yes, the above-given string has at least one digit in it”.
  • Else print “No, the above-given string doesn’t have at least one digit in it”.
  • The Exit of the program.

Below is the implementation:

# Give the string as static input and store it in a variable.
gvn_str = "Hello 123 this is BTechGeeks online Platform "
# Take a variable say k and initialize its value to 0.
k = 0
# Calculate the length of the given string using the len() function.
# store it in another variable.
str_lengt = len(gvn_str)
# Loop from 0 to the length of the given string using the for loop.
for itr in range(0, str_lengt):
  # Check if the character present at the iterator value of the given string string is
  # greater than or equal to 0 and less than or equal to 9 using the if
  # conditional statement.
    if gvn_str[itr] >= '0' and gvn_str[itr] <= '9':
        # If the statement is true, then increment the value of the above-initialized k by 1.
        # Exit the loop.
        k += 1
# Check if the value of k is greater than or equal to 1 using the if conditional statement.
if k >= 1:
    # If the statement is true, then print "Yes, the above-given string has at least one
    # digit in it".
    print("Yes, the above given string has at least one digit in it")
else:
    # Else print "No, the above-given string doesn't have at least one digit in it".
    print("No, the above-given string doesn't have at least one digit in it")

Output:

Yes, the above given string has at least one digit in it

Method #2: Using For loop (User Input)

Approach:

  • Give the string as user input using the input() function and store it in a variable.
  • Take a variable say k and initialize its value to 0.
  • Calculate the length of the given string using the len() function store it in another variable.
  • Loop from 0 to the length of the given string using the for loop.
  • Check if the character present at the iterator value of the given string string is greater than or equal to 0 and less than or equal to 9 using the if conditional statement.
  • If the statement is true, then increment the value of the above-initialized k by 1.
  • Exit the loop.
  • Check if the value of k is greater than or equal to 1 using the if conditional statement.
  • If the statement is true, then print “Yes, the above-given string has at least one digit in it”.
  • Else print “No, the above-given string doesn’t have at least one digit in it”.
  • The Exit of the program.

Below is the implementation:

# Give the string as user input using the input() function and
# store it in a variable.
gvn_str = input("Enter some random String = ")
# Take a variable say k and initialize its value to 0.
k = 0
# Calculate the length of the given string using the len() function.
# store it in another variable.
str_lengt = len(gvn_str)
# Loop from 0 to the length of the given string using the for loop.
for itr in range(0, str_lengt):
  # Check if the character present at the iterator value of the given string string is
  # greater than or equal to 0 and less than or equal to 9 using the if
  # conditional statement.
    if gvn_str[itr] >= '0' and gvn_str[itr] <= '9':
        # If the statement is true, then increment the value of the above-initialized k by 1.
        # Exit the loop.
        k += 1
# Check if the value of k is greater than or equal to 1 using the if conditional statement.
if k >= 1:
    # If the statement is true, then print "Yes, the above-given string has at least one
    # digit in it".
    print("Yes, the above given string has at least one digit in it")
else:
    # Else print "No, the above-given string doesn't have at least one digit in it".
    print("No, the above-given string doesn't have at least one digit in it")

Output:

Enter some random String = good morning btechgeeks
No, the above-given string doesn't have at least one digit in it

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